Note that packages often have a series of optdepends - optional dependencies - which are packages that provide additional functionality to the application, albeit not strictly required for running it. When installing a package, pacman will list its optional dependencies among the output messages, but they will not be found in pacman.log: use the pacman -Si (see Querying package databases) command to view the optional dependencies of a package, together with short descriptions of their functionality.
To install a single package or list of packages (including dependencies), issue the following command: